F5 Pool & Nodes

A Node is an IP address. Example: 10.10.10.10 A Pool Member is an IP Address + Port. Example: 10.10.10.10:8080 A Pool is a collection of Pool Members. If you are managing an enterprise grade F5 infrastructure, there may come a time when you may have … “F5 Pool & Nodes”

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F5 Upgrade from v10 to v11 – Lessons Learned

Pre-Maintenance Checks: Make sure that the F5 is running in “Volume Partition” mode. “lvscan” within bash should provide output like this: config # lvscan ACTIVE ‘/dev/vg-db-sda/dat.share.1’ [30.00 GB] normal ACTIVE ‘/dev/vg-db-sda/dat.log.1’ [7.00 GB] normal ACTIVE ‘/dev/vg-db-sda/dat.swapvol.1’ [1.00 GB] normal ACTIVE ‘/dev/vg-db-sda/set.1.root’ [392.00 MB] normal ACTIVE … “F5 Upgrade from v10 to v11 – Lessons Learned”

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F5 Email Alerts

F5 has the ability to send out an email for various events like the failure of a pool member. For 10.x code version, Postfix within F5 can be utilized to send out emails. Beginning in 11.x code version, Postfix is not utilized. We would have … “F5 Email Alerts”

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F5 Error – bcm56xxd

Oct 20 10:08:16 local/lb01 err bcm56xxd[3506]: 012c0011:3: I2C SFP operation failed: dev:0xee at :228, errmsg(Operation timed out) This specific error is benign. bcm56xxd has a thread that checks every 5 seconds to see if there is any units plugged or unplugged on all the SFP … “F5 Error – bcm56xxd”

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BigIP F5 – Poodle Vulnerability

Poodle was initially targeted against SSLv3. Quite a few websites fixed this issue at the server and client side by disabling SSLv3. There is a variation of Poodle for TLS with the following CVE ID: CVE-2014-8730. For a brief description of the issue: Poodle on TLS … “BigIP F5 – Poodle Vulnerability”

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iRule – To iRule or Not to

TCL based iRule is a force-multiplier when it comes to Application Delivery Networking utilizing F5 devices. However, it is essential to understand the interaction of iRule with the normal application. As an F5 iRule administrator, it is essential to understand the responsibility of maintaining the … “iRule – To iRule or Not to”

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BigIP F5 Rookie

Welcome to the world of Application Delivery Networking and F5 Platform. If you are new to BigIP F5 or Application Delivery Network and looking to see where to start, I would recommend the following: F5 University – This provides flash based introduction to some of … “BigIP F5 Rookie”

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F5 OneConnect

F5 has a trademark feature called OneConnect that leverages HTTP 1.1 Keepalive. In this article, I will try to explain the functionality of OneConnect, underlying technology and its usage requirements. There are 2 main reasons that I have utilized OneConnect profile: Efficient reuse of server side … “F5 OneConnect”

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